bonnets, housing boxes阀: established house or power g ...帽: cap; hat; helmet; headgear轴箱: axle box; axle housing; hous ...阀帽: bo et; bonnet轴箱: [工业] axle box; axle housing; housing box; journal-box; step box下载手机词典可随时随地查词查翻译关注微信公众号:chachacidian,回复:阀帽,轴箱,即可在微信中查询翻译